Edmond a



No. 6l5,006. Patented Nov. 29, I898. E. A. WARREN.

MARINE PBOPELLER.

(Application filed Mar. 11, 1898.)

(No Model.)

UNITED STATES PATENT OFFICE.

EDMOND A. VARREN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO THOMAS J. MOORE, OF SAME PLACE.

MARINE PROPELLER.

SPECIFICATION forming part of Letters Patent No. 615,006, dated November 29, 1898. Application filed March 11, 1898. Serial No. 673,472. (No model.)

To all whom it may concern.-

Be it known that I, EDMOND A. WARREN, a citizen of the United States, and a resident of the borough of Brooklyn, in the city of New York and State of New York, have invented a new anduseful Improvement in Marine Propellers, of which the following is a specification.

This invention relates to that class of propellers known as reciprocating propellers, in which hinged or pivoted paddle-blades are caused to spread when moved in that direction in which they actto propel the vessel and to collapse and be drawn together during their return movement.

My invention consists in the combination hereinafter described and claimed, whereby the operation of such a propeller is made more efficient and better provision is afforded for arresting the blades in the movements by which their propulsive action is reversed.

Figures 1 and 2 of the drawings are plan views of a propeller embodying my invention, Fig. 1 showing its parts in position for propelling forward and Fig. 2 showing them in position for backing. Fig. 3 represents a central longitudinal vertical sectional view of the same. Fig. 4 is a plan view of a row-boat to which the propeller is applied.

Referring first to Figs. 1, 2, and 3, A is the shaft of the propeller, arranged lengthwise of the vessel in fixed bearings A, in which it is free to slide lengthwise. The said shaft may have a longitudinal reciprocating motion imparted to it by any suitable means. 7 B B are a pair of hinged propeller-blades. These blades are not attached directly to the shaft A, but are attached to a rod 0, which is capable of sliding some distance lengthwise within the shaft, the latter being made hollow to receive the said rod 0. The said blades are hinged together and pivoted to the rod O by a pin a, which passes diametrically through said rod and through a longitudinal slot bin the shaft.

Attached to the shaft A at opposite ends of the slot b are stops 0 c, which face each other, either of which is capable of serving as a bearing for the propeller-blades according to the required direction of propulsion. These stops are each furnished with a sharp thin-edged cut-water d, which also serves as a brace to make a rigid connection between said stop and the shaft A. The said stops 0 0' have attached to them springs e e, which serve the purpose of reversing the inclination of the blades for reversing the direction of propulsion, as hereinafter described.

For the purpose of shifting the propellerblades from one to the other of the stops 0 0, according to the desired direction of propulsion, a lever D is fulcrumed to the shaft by a pin f and connected with a bracket 9, secured to the rod 0 and projecting through a slot h in the shaft A. The said lever may be worked in any suitable manner-'as, for example, by hand-and it may be locked to lock the rod C and hold the blades against either stop 0 or c by any suitable means, as by a locking-pin n, which passes through it and drops into either one of two holes 0 0 in a sector 19, which is rigidly attached to the shaft A. The said locking-pin is represented as attached to the lever by a spring g, which tends to hold it in either of the holes 0 0, but permits it to be raised to liberate the lever when the blades are to be shifted. By bringing the lever to a central position and dropping the pin n into a central hole 0 in the sector the propeller-blades having no support in the direction of the length of the shaft will be rendered inoperative.

The propeller constructed as above de scribed may be applied to work either through the bow or through the stern of a vessel, though preferably through the stern, as in the example represented. When the propeller thus applied is to be used for propelling the vessel forward, the rod 0 is brought by the lever D to its most forward position, so that the hinge of the propeller-blades has a hearing against the forward stop 0, as shown in Fig. 1. The propulsion is then effected by every backward movement of the shaft A, the blades being prevented by the stop a from folding in a forward direction, but being free to fold in a backward direction, as shown in dotted outline in Fig. 1, when the shaft makes its return or forward movement. When for propulsive action is produced by every forward movement of the shaft A, the blades then folding forward, as shown in dotted outline in Fig. 2, during every return or backward movement of the said shaft. In shifting the rod and the propeller-blades from one position to the other, as above described, the blades before coming to a positive bearing against the stop 0 or 0 meet the spring e or e of that stop and by the continued movement toward the stop the springs are caused to change the inclination of' the blades from forward to backward, as may be understood by reference to the illustration of the blades in full outline in Figs. 1 and 2, the stops being so constructed that when the blades come to a solid bearing they have a slight backward inclination for propelling forward, as shown in Fig. 1, or a slight forward inclination for propelling backward, as shown in Fig. 2. The springs serve the additional purpose of preventing the slamming of the blades against the stops when they are shifted from one stop to the other.

In Fig. at the propeller-shaft A is represented as furnished with a cross-head i, which is connected by rods j with two hand-levers 70, fulcrumed at Z to the sides of the boat, so that the person sitting 011 the thwart L with his face toward the bow and working the said levers like oars may effect the propulsion. In

this view the lever D for adjusting the rod 0 and propeller-blades for propelling ahead or backing has connected with it two rods mm, which may be operated by the feet of the rower to effect the said adjustment.

Two propellers, such as that illustrated by Figs. 1, 2, and 3, may be used arranged side by side in a vessel like twin screw-propellers, and in that case the steering or turning of the vessel may be effected by adjusting their respective rods C to bring the blades of one to the forward stop a and those of the other to the rear stop 0.

\Vhat I claim as my invention is- In a reciprocating propeller, the combination of a hollow reciprocating shaft, a rod fitted to slide lengthwise within said shaft, foldingpropeller-blades attached to said rod,stops facing each other on said shaft, means for shifting said rod within the shaft to bring the propeller-blades to one or other of said stops and springs applied between said stops and the blades, substantially as herein described.

In testimony that I claim the foregoing as myinvention I have signed my name, in presence of two witnesses, this 9th day of March, 1998.

EDMOND A. IVARREN.

\Vitnesses:

FREDK. HAYNES, EDWARD VIESER. 

